Distribution and Abundance of Least Bell’s Vireo (Vireo bellii pusillus) and Southwestern Willow Flycatcher (Empidonax traillii extimus) at the Sepulveda Dam Basin, Los Angeles County, California—2025 Data Summary

March 20, 2026

Publication Year	2026
Title	Distribution and Abundance of Least Bell’s Vireo (Vireo bellii pusillus) and Southwestern Willow Flycatcher (Empidonax traillii extimus) at the Sepulveda Dam Basin, Los Angeles County, California—2025 Data Summary
DOI	10.3133/dr1219
Authors	Lisa D. Allen, Barbara E. Kus
Publication Type	Report
Publication Subtype	USGS Numbered Series
Series Title	Data Report
Series Number	1219
Index ID	dr1219
Record Source	USGS Publications Warehouse
USGS Organization	Western Ecological Research Center

Citation Information